Shoppers on Oxford Street are being warned about a new scam, being used to con them out of their money.
It involves women - normally members of Romanian gangs - fooling people into handing over cash in exchange for worthless metal rings.
Westminster Council wardens say the scam has now become so common they are dealing with several incidents a day.
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The Met Police says 143 firearms have been handed in at stations across the capital in just seven days, including two antique machine guns.
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